I have no idea. This isn’t one of my favorite jackets. This specific design. So you might be right. I just meant vintage jackets in general ive seen balloon arms on plenty. But if this specific model did not have that; then I don’t know! Then ya got me why they’d do that haThese don't look that wide, but maybe the photo setup is deceiving.
View attachment 328083
View attachment 328088
Edit: typo